Before and after: Competitive dancer Lacey Schwimmer has undergone a major transformation since first apperearing on DWTS, pictured left in 2009 and, right, in August of this year

Dancing With the Stars competitive dancer Lacey Schwimmer appears to have succumbed to the pressure to transform herself into a Barbie doll since she arrived in Los Angeles three years ago.

The 23-year-old So You Think You Can Dance champion has reportedly undergone several surgical procedures including a nose job, lip enhancement and, just this summer, a breast enlargement to enhance her bust two cup sizes, from a B to a D.With her blonde locks and perma-tan, Lacey is practically unrecognisable from the petite brunette of 2009.

Lacey, who partnered Chaz Bono, Cher's transgendered son, on this season of DWTS, recently went under the knife for a hush-hush boob job.

Having long faced criticism over her figure, Lacey, who said she was 'happy' to have an athletic build instead of a model shape, couldn't be more thrilled with her latest look US Magazine reported.

Lacey certainly seems happy with her new fuller figure as she has been at pains to flaunt it as often as possible in front of the cameras.

An insider told US: She loves the results and she's proud of her new shape.'

Barbie girl: Frolicking on the beach in Malibu Lacey seems eager to show off her newly enhanced bust

Tinsel town: Like many girls in Los Angeles, Lacey has found criticism of her looks difficult to cope with

Chaz Bono braved controversy to be the first transgender contestant on Dancing with the Stars, but he revealed in an interview today that it was jibes over his weight that troubled him the most.

The only child of Cher, 65 , and the late Sonny Bono, told Good Morning America: 'I was called a basketball, a penguin, an Ewok, and I just didn't appreciate it.'

Bono, who was joined by dancing partner Lacey Schwimmer, 23 , for the interview said he felt particularly attacked by Bruno Tonioli, 55 , who compared him to the flightless bird.

He said: 'If you want to critique my dancing and give me some constructive advice so I can try to improve the next time that I'm there, that would be great.

Biggest Loser: Chaz and Lacey crashed out of season 13 unhappy with the judges' treatment of them